Clutch for rotary draw works



E. J. ROACH Filed June 1, 1936 I ll CLUTCH FOR ROTARY DRAW WORKS Feb. 23, 1937.

Edmuncld. Roach I l l 31mm @4112 m QM Patented Feb. 23, 1 937 A ENT OF-FlCE cw'ron roa ROTARY pnaw woaxs Edmund J. Roach, Beaumont, Ten, assignor to Beaumont Iron Works Company, Jeflerson County, Tex" a corporation Application June 1,.1936, Serial No. 8 2,145 u ysoloims. (01.254-187) -My invention relates to the generalconstruction of a clutch to be employed with a hoisting drum such as is ordinarily? employed in the draw works of a drilling While the invention is adapted for general purposes it may be cone sidered as being-applied particularly to hoisting drums such asare employed on drilling rigs oi.

the character stated.

It is an object or the invention to provide a v clutch for use on draw works; of this character in whichthere are no keys or other similar means for attaching the slidable clutch member L tothe drive shaft.-

It is an object of the invention 'to elimlnate the torque due to the drive sprocket ,upon the shai't upon which the drum is mounted.

It is a further object to provide a plurality oi splines orkeys connecting the drive sprocket with the sleeve upon which'the clutch is mounted.

It is another'object of the invention-to. provide a clutch so mounted upon the shaft that it may be easily disassembled and removed when v desired for purposes of repair or otherwise;

It is another object ottheinvention to provide a clutch of either the dental or spiral type,-.both

---.tion upon the drum and shaft.

, members ot which are removably secured in posi-f v s v l rings in position. n the outer lace of each Otherobjects will more clearly appear .irom' clutch ring are longitudinally extending Jteeth thespecii'lcation and-drawing herewith'.- with reference to the drawingyFig. l

'ew partly in. elevation and partly n central longitudinal section illustrating application or myelutch to this t or d Fig. 2"is a transverse section on the. plane-L4 oiFlg.1..

- My hoisting-drum is mounted upon a shaft I adapted to besupp'orted at its ends in bearing sleeve interlock within similar grooves or keyways on the inner side of the movable jaw mem'- .--supports I or anyordinary construction. Upon this shaft is iixed a-hois'ting drum .in-

{i ployed in raising and lowering d'evlces upon the operations.

The ends of theshown at 1 so thatthe drum will rotate, with The. same general assembly .as stated above construction. 2 The hub! is keyed to theshatt as constructed and mounted in one piece -to cooperate with the a front member. The movable jaw member comprises cluding a central spool-member 3 which may be I 0t solid-or hollow construction as desired. Upon this portion of the drumyis reeledfa c'ableem-l' platform and to andlower the-drilbstem in I homo. -to receive ahub or extension! on which As will be seen from Fig. -i thei andjinstead or being keyed to the shaft can'lbe fitted with either plain or anti-friction bearings mountedin" hubs of flanges 4 and 5 and inthis event the shall; ,i would be a stationary member I supported at each end-with a suitable anchorage 5 and the drum assembly would rotate on shaft i in a laterally fixed position as shown.

Mounted on the outer side of each flange 4 and 5 is a brake drum 8 of ordinary construction secured to theflange by bolts 9 or any other 10 This brake drum is adapted usual brake band and forms no .novel feature of my invention.

- Mounted on the outer side of the hub 8 on preferred means eitherflang'e 4 or 5 or both flanges, is a removable-clutch ring Hi. This clutch ring comprises an annular ring which interiits with the proiec-* tions onthe hub as'shown at H inFig'. l. The hub and clutch ring. are thus interlocked so that they will rotate together with the shaft. The

clutch rings are held in-position upon the hubs at each end of the drum by means of through bolts .through' the drum and the hub and have nuts IS on' the ends thereof whereby the rods-may 12], which 'areextended longitudinally be tightened so as to securely hold the clutch i4 which are" adapted to inter-engage with similar clutch teeth ii on the opposing movable jaw '30 a body li-ot annular shape which is fitted over the inner end of a sleeve l1. Said movable jaw member is slidable along the sleeve H but is rotatablefitherewith through longitudinal ridges or keys I! shown best in Fig. 2, these keys extending radially along the outer surface 0! the her lt. The inner face or thesaid jaw member 40 is iormedwith teeth-15 a P eviously noted to engage with the teeth i4, on "the face of the ".eIutch ring it, mounted on the flanges either J -w m Filed on the sleeve i1 closely 'adjaoentthe outer face of the movable Jaw member II is a sprocket wheel 19. Said sprocket wheel is of ordinary construction having teeth 24 thereon the hub oi the wheel is keyed, as shown at 2|,

to'thesleeve; m

The movable jaw member I 0 is movable through 4 an outer, disc 22 which is flxed'sli dably upon the outer suriaceoi sleeve .l'l or sprocket hub extension andextended radially outward beyond the outer'circum ference'oithe movable jaw member 5 in an obvious manner I. It is connected with such movable jaw memher by clutch engaging bolts 23 which are extended between the spokes of the sprocket wheel 2| and engaged at Il-within the outer face of the movable Jaw member. The outer periphery of the disc is formed with a tongue II which for moving the ring 26 longitudinally of the drum to shift the clutch member it into or out of locked position with the fixed ring II.

It will be noted that the construction of the clutch mechanism is exceedingly simple and durable. The drum itself is flxed'to the shaft along with the clutch ring. II. The sprocket wheel with the sleeve l1 and the clutch operating members thereon are rotatable about the shaft and havebearings 21 thereon between the sleeve and the shaft. Itis therefore unnecessary to form keyways in the shaft along the clutch member in such manner as to weaken the shaft. The sprocket wheel and clutch are both fixed to the sleeve II, which is ordinarily rotatable on the shaft.

The Jaw member I! may be moved to'and from position engaging with the clutch ring Ill and the driving torque from the sprocket wheel to the drum is taken up directly on the fixed ring III. This type of structure does not tend to reduce the strength of the shaft and it allows easy repair of the clutch Jaws at any time desired without the loss of a material amount of time. The entire outer clutch mechanism may be disassembled with the removal of a few connecting bolts. The device is therefore not only economical to construct but is strong and durable and operates with a minimum amount of strain upon the shaft. The further objects of the invention will be obvious to those skilled in the art.

What is claimed as new is: l

1. A rotatable shaft, 9, hoisting drum thereo a hub on said drum fixed'to on said hub, a. toothed clutch ring secured 'removably to said flange, a sleeve rotatable on said shaft adjacent said clutch ring, a sprocket on said sleeve, a toothed jaw member mounted slidably but nonrotatably upon said sleeve, and means to move said last named Jaw member to and from engagement with said clutch ring.

2. A rotatable shaft, a hoisting drum thereon,

a hub on said drum fixed to said-shaft, a flange on said hub. a toothed clutch ring secured removably to said flange, a sleeve rotatable on said shaft adjacent said clutch ring, a sprocket on said sleeve, a toothed jaw member mounted slidably but nonrota'tably upon said sleeve between said sprocket and said removable Jaw member, and means movable on said sleeve to shift said slidable clutch ring to and from engagement with said removable clutch ring.

3. A rotatable shaft, ahoisting drum thereon,

' to said drum adjacent said shaft, a flange a-hub on said drum fixed to said shaft, a flange on said hub, a toothed clutch ring secured removably to said flange, a sleeve rotatable on said shaft adjacent said clutch ring, a sprocket on said sleeve, 9. toothed jaw member mounted slidably but nonrotatably upon said sleeve, and means to move said Jaw member to and from engagement with said clutch ring, said means including a disc mounted slidably on said sleeve and bolts connecting said disc and said slidable clutch ring.

4. Ahoisting apparatus including a shaft, a drum thereon. a clutch ring secured removably to one end of said drum, a sleeve rotatable relative said clutch ring, an annular- Jaw member keyed slidably on said sleeve,

means to rotate said sleeve, said sleeve being held in a laterally fixedposition, and means to move said Jaw member relative to said clutch ring.

5. A device of the character stated including a shaft, a drum thereon including a cylindrical spool, flanges keyed to said shaft and interfitting with the ends of said'spool, a removable clutch ring interfitting with the outer side of one of. said flanges, rods extending longitudinally through said ring, flanges and said spool to hold the same in assembled position, a sleeve rotatable on said shaft adjacent said clutch ring. a jaw member slidable but nonrotatable on said sleeve, and means to move said jaw member to and from position engaging said clutch ring.

6. A device of the character stated including a shaft, a drum thereon including a cylindrical spool, flanges keyed to said shaft and interfitting with the ends of said spool, a removable clutch member interfitting with the outer side of one of said flanges, rods extending longitudinally through said clutch ring, flanges and said spool to hold the same in assembled position, a sleeve rotatable on said shaft adjacent said clutch ring, a jaw member keyed slidably'upon said sleeve, a sprocket wheel fixed to said sleeve and means on said sleeve to movesaid jaw member.

7. A- hoisting apparatus including a shaft, a drum mounted non-rotatably thereon, a clutch "ring secured removably to one end offsaid drum, a sleeve rotatable on said shaft adjacent said ring, an annular jaw member keyed slidably on said sleeve, means to rotate said sleeve, said sleeve being fixed against longitudinal movement, and

separate means to engage said jaw member with said clutch ring. I

8. A hoisting apparatus including a shaft. a

drum mounted non-rotatably thereon, a clutch,

EDMUND J ROACH. 

